Expression (REF ) can be organized in terms of the flavor \(\mathbf {1}\) , \(\mathbf {8}\) , and \(\mathbf {27}\)  contributions as [1]}
\(\delta M_{\textrm {loop 2ad}}^k = F_\mathbf {1} M_{\mathbf {1},\textrm {loop 2ad}}^{kQ} + F_\mathbf {8} M_{\mathbf {8},\textrm {loop 2ad}}^{kQ} + F_\mathbf {27} M_{\mathbf {27},\textrm {loop 2ad}}^{kQ}. \) 
